Physics, 19.02.2020 17:32 patricklap4951
Solar cells are given antireflection coatings to maximize their efficiency. Consider a silicon solar cell (n = 3.5) coated with a layer of silicon dioxide (n = 1.45). What is the minimum coating thickness (in nm) that will minimize the reflection at the wavelength of 700 nm, where the solar cell is most efficient?
Answers: 2
Physics, 22.06.2019 07:50
2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it
Answers: 1
Physics, 22.06.2019 09:00
In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final
Answers: 1
Physics, 22.06.2019 14:20
4r-134a enters the condenser of a residential heat pump at 800 kpa and 50ยฐc at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3ยฐc. the refrigerant enters the compressor at 200 kpa superheated by 4ยฐc determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)
Answers: 3
Solar cells are given antireflection coatings to maximize their efficiency. Consider a silicon solar...
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